About: How do electric trains work   Sponge Permalink

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An electric train or an electric locomotive is a locomotive powered by electricity from an external source. Sources include overhead lines, third rail, or an on-board electricity storage device such as a battery or flywheel system. Electric trains in big cities are called EMU, electric multiple unit trains. The term multiple unit or MU is used to describe a self-propelling train unit capable of coupling with other units of the same or similar type and still being controlled from one cab. Image: Electric Multiple Units waiting to enter service in Poland.

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  • How do electric trains work
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  • An electric train or an electric locomotive is a locomotive powered by electricity from an external source. Sources include overhead lines, third rail, or an on-board electricity storage device such as a battery or flywheel system. Electric trains in big cities are called EMU, electric multiple unit trains. The term multiple unit or MU is used to describe a self-propelling train unit capable of coupling with other units of the same or similar type and still being controlled from one cab. Image: Electric Multiple Units waiting to enter service in Poland.
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  • An electric train or an electric locomotive is a locomotive powered by electricity from an external source. Sources include overhead lines, third rail, or an on-board electricity storage device such as a battery or flywheel system. Electric trains in big cities are called EMU, electric multiple unit trains. The term multiple unit or MU is used to describe a self-propelling train unit capable of coupling with other units of the same or similar type and still being controlled from one cab. Image: Electric Multiple Units waiting to enter service in Poland. A multiple unit trainset has the same power and traction components as a locomotive, but instead of the components concentrating in one carbody, they are spread out on each car that makes up the set. Therefore these cars can only propel themselves when they are part of the set; thus making them semi-permanently coupled. For example, a DMU might have one car carry the prime mover and traction motors, and another the engine for head end power generation; an EMU might have one car carry the pantograph and transformer, and another car carry the traction motors. Virtually all rapid transit rolling stock, such as ones used in subway systems, are multiple unit trainsets, usually EMUs. Many high-speed rail rolling stocks are also multiple unit trainsets, such as the Japanese Shinkansen and the German ICE 3 high-speed trains.
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